Improvement in floor-clamps



UNITED STATES SETH C. WlNSLOW AND SAMUEL WINSLOW,

OF WORCESTER, MASS.

IMPROVEMENT IN FLOOR-CLAMPS.

Specification forming part of Letters Patent N o. 54,805, dated May 15, 1866.

To all whom it may concern:

Be it known that we, SE'rH C. WINsLoW and SAMUEL WINsLOW, 'ot Worcester, in the. county of Worcester and State of Massachusetts, have invented an Improved Floor-Clamp; and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specication- Figure 1 being a top view ofthe clamp, and Fig. 2 a side View thereof.

Like letters designate corresponding parts in both gures.

We employ a stock, A, which may have, though not necessarily, a claw, a., projecting downward from the rear end to assist in holding it in place. Through this stock a shaft, C, extends lengthwise, which is provided with a screw-thread, c, on one end, to run in a hollow screw or nut in the stock, and thus cause the shaft to move therein by turning, the shaft being enough longer than the stock to allow all the movement ever desired.

On the forward end of the shaft a clamp-jaw, B, is situated, the end l) on the shaft turning freely in the jaw. The `other end of the shaft is provided with a head, D, having holes d, for inserting a rod or lever to turn the shaft with, so as to move the jaw B against the boards of the oor.

Our invention consists in combining with the instrument as above described dogs Gr Gr, located at the sides of the stock A, and pivoted thereto byjonrnalsgg, which are held in place by screws h h, or their equivalents, substantially' as represented in the drawings. When the clamp is set to tighten a board in the iloor these dogs are first driven down in to the sleeper or under floor, on which the clamp rests, and then they hold the clamp securely, so that any required amount of force may be employed to clamp the board to its place without displacing the clamp. The dogs are readily set free again for a renewal ofthe operation.

What we claim as our invention, and desire to secure by Letters Patent, is-

The combination of the dogs Gr Gr with the oor-clamp, substantially as and for the purpose herein specified.

The above specification of our improved floorclamp signed by us this 27th day ot January, 1866.

SEIH O. l/VINSLOW. SAMUEL WINSLOVV.

Witnesses A. H. KNAPP, MALcoM W. MAYNARD, 

